feat(core): add interactive env var

[Coly010]

Add a NX_INTERACTIVE env var that can be used from generators to determine if they can run interactive logic such as handling prompts.
Move the setting of NX_DRY_RUN to the yargs handler of the generate command so it is as visible as possible.

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Name	Status	Preview	Comments	Updated
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Feb 15, 2023 at 4:24PM (UTC)

[AgentEnder]

I really think some of this may make sense in a GeneratorContext object, but I know @FrozenPandaz has been against that in the past.

I imagine something like

export interface GeneratorContext {
  projectGraphSnapshot: ProjectGraph
  dryRun: boolean
  interactive: boolean
}

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• nx run-many -t e2e-macos --parallel=1 --exclude=e2e-detox
• nx affected --target=e2e --base=76d9f8bdc75e788001cd88d6ac6b1603c60f7bba --head=3082fa913389c836e8daeca6d80c0be294099e1e --exclude=e2e-storybook,e2e-storybook-angular --parallel=1
• nx affected --target=test --base=76d9f8bdc75e788001cd88d6ac6b1603c60f7bba --head=3082fa913389c836e8daeca6d80c0be294099e1e --parallel=1
• nx affected --target=build --base=76d9f8bdc75e788001cd88d6ac6b1603c60f7bba --head=3082fa913389c836e8daeca6d80c0be294099e1e --parallel=3
• nx affected --target=lint --base=76d9f8bdc75e788001cd88d6ac6b1603c60f7bba --head=3082fa913389c836e8daeca6d80c0be294099e1e --parallel=3
• nx run-many -t root-lint check-imports check-commit check-lock-files depcheck --parallel=1 --no-dte
• nx-cloud record -- nx format:check --base=76d9f8bdc75e788001cd88d6ac6b1603c60f7bba --head=3082fa913389c836e8daeca6d80c0be294099e1e
• nx documentation --no-dte

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